gistfile1.txt

class Message
  include ActiveModel::Conversion
  include ActiveModel::Validations
  extend ActiveModel::Naming

  def initialize(attributes = {})
    attributes.each do |key, value|
      eval "class << self; attr_accessor :#{key}; end"
      send("#{key}=", value)
    end
  end

  def persisted?
    false
  end
end